(W) Yuki Amemiya (A/CA) Ichihara Yukino. Kokuryuu Kaguya was only a little boy when he witnessed his father murdered by a group of demons. Now a teenager* Kaguya still remembers. One day* Kaguya is struck by a mysterious light and meets a young woman named Mao* a skillful warrior wearing bunny ears* who rescues him from a demon attack* then demands to know what planet he's from! Kaguya finds himself inducted into a secret organization of other-worldly individuals whose goal is to defend Earth from monstrous invaders. Reborn as a Battle Rabbit* strange powers awaken within Kaguya which allow him to fight these creatures and seek vengeance for his father's death!